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imsm: Support setting max size for size change operation 

Add support for setting max size for size change operation using
imsm_get_free_size() function for computing maximum available space.

Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Adam Kwolek 2012-04-13 16:52:05 +02:00 committed by NeilBrown
parent 13bcac9059
commit b130333f39
1 changed files with 22 additions and 2 deletions
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24
super-intel.c
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@ -9953,7 +9953,7 @@ enum imsm_reshape_type imsm_analyze_change(struct supertype *st,
*/
current_size = info.custom_array_size / 2 / data_disks;
if ((current_size != geo->size) && (geo->size > 0)) {
if ((current_size != geo->size) && (geo->size >= 0)) {
if (change != -1) {
fprintf(stderr,
Name " Error. Size change should be the only "
@ -9968,7 +9968,27 @@ enum imsm_reshape_type imsm_analyze_change(struct supertype *st,
super->current_vol, st->devnum);
goto analyse_change_exit;
}
geo->size *= 2;
if (geo->size == 0) {
/* requested size change to the maximum available size
*/
unsigned long long freesize;
int rv;
rv = imsm_get_free_size(st, dev->vol.map->num_members,
0, chunk, &freesize);
if (rv == 0) {
fprintf(stderr, Name " Error. Cannot find "
"maximum available space.\n");
change = -1;
goto analyse_change_exit;
}
geo->size = freesize + current_size;
/* round to chunk size */
geo->size &= ~(chunk-1);
} else
geo->size *= 2;
if ((direction == ROLLBACK_METADATA_CHANGES)) {
/* accept size for rollback only
*/